fight windmills การใช้

• And teach your precious children not to fight windmills, as well.
• "How long are we going to fight windmills ? " said Habibi, the Palestinian who won the highest Israeli literary award two years ago.
• The phrase derives from an episode in the novel " Don Quixote " by Miguel de Cervantes, wherein protagonist Don Quixote fights windmills that he imagines are giants.